Apparatus

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sensors Mode-S transponder

4B1920

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-JNK · BOEING 777-300ER

Hex
4B1920
Octal
22614440
Decimal
4,921,632
Country
CH
Tail
HB-JNK
Type
B77W
No current signal · last broadcast 5h ago
Flights observed
180
Distinct callsigns
18
Country
CH
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 4B1920.

Country allocation

The ICAO 24-bit address 4B1920 falls within the block assigned to Switzerland (CH) by ICAO Annex 10, Volume III. Every aircraft registered in Switzerland receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 18 distinct

Callsign Airline Flights Last seen
SWR35G - 15 2026-07-11
SWR64E - 14 2026-07-10
SWR181 - 14 2026-07-13
SWR139 - 14 2026-06-19
SWR65 - 13 2026-07-11
SWR180 - 13 2026-07-12
SWR39 - 12 2026-07-12
SWR138 - 12 2026-06-19
SWR176 - 10 2026-07-13
SWR177 - 9 2026-07-06
SWR93 Swiss International Air Lines 8 2026-06-10
SWR92 Swiss International Air Lines 8 2026-06-10
SWR161 - 8 2026-07-05
SWR160 - 8 2026-07-04
SWR41G - 6 2026-07-03
SWR40 - 6 2026-07-02
SWR9G - 5 2026-07-10
SWR8T - 5 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 SWR176 - Jul 13, 21:20 UTCJul 14, 08:55 UTC11h 35m
2026-07-13 SWR181 - Jul 13, 06:10 UTCJul 13, 17:15 UTC11h 5m
2026-07-12 SWR180 - Jul 12, 16:50 UTCJul 13, 02:55 UTC10h 5m
2026-07-12 SWR39 SFO → ZRH Jul 12, 03:15 UTCJul 12, 13:40 UTC10h 25m
2026-07-11 SWR35G - Jul 11, 12:40 UTCJul 12, 00:30 UTC11h 50m
2026-07-11 SWR65 - Jul 11, 00:00 UTCJul 11, 08:50 UTC8h 50m
2026-07-10 SWR64E - Jul 10, 20:35 UTCJul 10, 21:05 UTC30m
2026-07-10 SWR64E - Jul 10, 11:35 UTCJul 10, 13:00 UTC1h 25m
2026-07-10 SWR9G - Jul 10, 00:55 UTCJul 10, 08:55 UTC8h 0m
2026-07-09 SWR8T ZRH → ORD Jul 9, 11:45 UTCJul 9, 20:40 UTC8h 55m
2026-07-09 SWR9G - Jul 9, 00:55 UTCJul 9, 08:45 UTC7h 50m
2026-07-08 SWR8T ZRH → ORD Jul 8, 12:30 UTCJul 8, 21:20 UTC8h 50m
2026-07-06 SWR177 - Jul 6, 16:00 UTCJul 7, 04:20 UTC12h 20m
2026-07-05 SWR176 - Jul 5, 21:05 UTCJul 6, 08:50 UTC11h 45m
2026-07-05 SWR161 - Jul 5, 02:30 UTCJul 5, 16:45 UTC14h 15m
2026-07-04 SWR160 ZRH → NRT Jul 4, 11:40 UTCJul 4, 23:45 UTC12h 5m
2026-07-03 SWR41G - Jul 3, 05:20 UTCJul 3, 15:25 UTC10h 5m
2026-07-02 SWR40 - Jul 2, 15:45 UTCJul 3, 03:05 UTC11h 20m
2026-07-02 SWR39 SFO → ZRH Jul 2, 03:00 UTCJul 2, 12:55 UTC9h 55m
2026-07-01 SWR35G - Jul 1, 12:35 UTCJul 1, 23:40 UTC11h 5m
2026-07-01 SWR65 - Jul 1, 00:40 UTCJul 1, 09:15 UTC8h 35m
2026-06-30 SWR64E - Jun 30, 12:15 UTCJun 30, 21:50 UTC9h 35m
2026-06-30 SWR65 - Jun 30, 00:35 UTCJun 30, 09:10 UTC8h 36m
2026-06-29 SWR64E ZRH → MIA Jun 29, 12:45 UTCJun 29, 22:10 UTC9h 25m
2026-06-29 SWR65 - Jun 29, 00:39 UTCJun 29, 09:05 UTC8h 25m
2026-06-28 SWR64E ZRH → MIA Jun 28, 12:09 UTCJun 28, 21:50 UTC9h 40m
2026-06-27 SWR177 - Jun 27, 15:49 UTCJun 28, 04:05 UTC12h 15m
2026-06-26 SWR176 - Jun 26, 21:04 UTCJun 27, 08:55 UTC11h 50m
2026-06-26 SWR181 - Jun 26, 06:09 UTCJun 26, 17:04 UTC10h 55m
2026-06-25 SWR180 - Jun 25, 16:59 UTCJun 26, 03:10 UTC10h 10m
2026-06-25 SWR39 - Jun 25, 02:49 UTCJun 25, 13:45 UTC10h 55m
2026-06-24 SWR35G - Jun 24, 12:04 UTCJun 24, 23:14 UTC11h 10m
2026-06-23 SWR177 - Jun 23, 16:35 UTCJun 24, 05:09 UTC12h 35m
2026-06-22 SWR176 - Jun 22, 21:10 UTCJun 23, 08:50 UTC11h 40m
2026-06-22 SWR181 - Jun 22, 06:15 UTCJun 22, 17:25 UTC11h 10m
2026-06-21 SWR180 ZRH → BKK Jun 21, 16:34 UTCJun 22, 02:40 UTC10h 5m
2026-06-21 SWR41G - Jun 21, 02:55 UTCJun 21, 13:39 UTC10h 45m
2026-06-20 SWR40 - Jun 20, 12:39 UTCJun 20, 23:59 UTC11h 20m
2026-06-19 SWR139 - Jun 19, 17:59 UTCJun 20, 04:04 UTC10h 5m
2026-06-19 SWR139 - Jun 19, 15:34 UTCJun 19, 15:49 UTC15m
2026-06-19 SWR138 - Jun 19, 07:49 UTCJun 19, 08:24 UTC35m
2026-06-18 SWR138 - Jun 18, 20:50 UTCJun 19, 05:34 UTC8h 44m
2026-06-18 SWR181 - Jun 18, 06:20 UTCJun 18, 17:35 UTC11h 15m
2026-06-17 SWR180 ZRH → BKK Jun 17, 16:40 UTCJun 18, 02:50 UTC10h 10m
2026-06-17 SWR41G - Jun 17, 02:55 UTCJun 17, 13:50 UTC10h 55m
2026-06-16 SWR40 ZRH → LAX Jun 16, 11:40 UTCJun 16, 22:40 UTC11h 1m
2026-06-15 SWR177 - Jun 15, 15:59 UTCJun 16, 04:25 UTC12h 25m
2026-06-14 SWR176 - Jun 14, 21:05 UTCJun 15, 08:40 UTC11h 34m
2026-06-14 SWR41G - Jun 14, 02:55 UTCJun 14, 13:30 UTC10h 35m
2026-06-13 SWR40 ZRH → LAX Jun 13, 12:00 UTCJun 13, 23:20 UTC11h 20m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the HB-JNK page for operator, model, and routing details .

Mode-S 4B1920 frequently asked

What is Mode-S code 4B1920?
4B1920 is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-JNK.
Where is Mode-S 4B1920 registered?
Mode-S code 4B1920 is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B1920 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B1920, octal 22614440, decimal 4,921,632.
What flights does 4B1920 operate?
Mode-S 4B1920 has broadcast 18 distinct callsigns, including SWR35G, SWR64E, SWR181, SWR139, SWR65.